JPH0535291B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a mechanism for converting reciprocating linear motion of a slide member into intermittent rotational motion.

(Prior Art) A ratchet mechanism as shown in FIG. 10 is known as a mechanism for periodically rotating a gear or the like in a fixed direction. This ratchet mechanism meshes a drive pawl 101 and a restriction pawl 102 with a gear 100, so that one rotation of the drive pawl 101 causes the gear 100 to rotate one frame, and the restriction pawl 102 prevents the gear 100 from rotating back. The regulating pawl 102 is urged in the direction of the gear 100 by a spring 103.

Furthermore, not only the above-mentioned ratchet mechanism but also generally applied intermittent rotation mechanisms combine gears and pawls.

(Problems with the prior art) Since the conventional intermittent rotation mechanism described above combines gears and pawls, there is a limit to how small the mechanism itself can be made, and furthermore, a return spring must be provided for the pawls, which is extremely difficult to achieve. It is difficult to assemble into a limited space, and the manufacturing of the members that make up the mechanism is also troublesome. Further, the conventional mechanism generates a large amount of operating noise due to the engagement between gears and pawls, and cannot operate at high speed.

(Object of the Invention) The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to achieve a device that can be significantly smaller than the conventional one, has easy manufacturing of component parts, and is suitable for high-speed operation. It is an object of the present invention to provide an intermittent rotation mechanism that can be operated at a low speed by an operator or the like.

(Structure of the Invention) In order to achieve the above object, the present invention provides a slide that makes reciprocating linear motion with respect to a case and is provided with an elongated hole formed so that its long axis is in a direction different from the direction of the reciprocating linear motion. a biasing member that returns the linearly moved slide member to the reference position, a magnet pin that is slidably inserted into the elongated hole, and a biasing member that is fixed in the case so as to overlap one surface of the slide member and that is attached to the slide member. a fixed body in which a magnet portion whose opposing portions are N poles and a magnet portion whose S poles are provided spaced apart or adjacent to each other in the circumferential direction; An intermittent rotation mechanism was constituted by a driven rotating body having a plurality of recesses in the circumferential direction at intervals equal to the intervals of the magnet parts, into which magnet pins inserted into elongated holes of the member were fitted.

(Example) Examples of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a mechanism according to the present invention, FIG. 2 is a plan view of the same mechanism, and FIG. 3 is an exploded perspective view of the main components of the mechanism.

In the figure, reference numeral 1 denotes a case. A driven rotating body 2 having a rotating shaft 2a is disposed inside the case 1. An annular recess 3 is formed on the upper surface of the driven rotating body 2, and a lower end of the rotating shaft 2a is formed in the upper surface of the driven rotating body 2. is connected to the operating rod 4, and an operating piece 5 is provided at the lower end of the operating rod 4.
By rotating, the operation piece 5 sequentially selectively operates the limit switches 6a, 6b, and 6c.

Furthermore, a slide member 7 that is slidable with respect to the case 1 is stacked on the driven rotary body 2. A rectangular window 8 is formed in the longitudinal direction of the slide member 7, and the rotation shaft 2a of the driven rotating body 2 is exposed to the window 8, so that the sliding of the slide member 7
In addition, a collar 9 is fitted onto the rotating shaft 2a facing the window 8, and springs 10, 10 are compressed between the collar 9 and both ends of the window 8. When no force is applied, the slide member 7 maintains a neutral position.

A long hole 11 is formed in the slide member 7 in a direction perpendicular to the window 8, and a magnet pin 12 of approximately the same length as the depth of the long hole is inserted into the long hole 11.
It is inserted so that it can freely slide in both the longitudinal direction and the depth direction.

Furthermore, a fixed body 14 fixed to the case 1 with screws 13 is disposed on the upper surface of the slide member 7, and the upper end of the rotating shaft 2a is rotatably inserted into the fixed body 14. As shown in FIG. 3, the fixed body 14 has three magnets 15, 16, spaced apart in the circumferential direction.
17 is buried so that the magnets 15 and 17 have the same magnetic pole direction, and the magnet 16 has the magnetic pole direction opposite to the magnets 15 and 17. For example, when the part of the magnet pin 12 facing the fixed body 14 is set as the N pole, the magnet 15,
Regarding the magnet 17, the portion facing the slide member 7 is the south pole, and the portion of the magnet 16 facing the slide member 7 is the north pole.

Furthermore, a plurality of recesses 18 are further formed in the annular recess 3 of the driven rotating body 2. This recess 18
is large enough to fit the magnet pin 12 into each recess 1.
8... is the distance between the magnets 15 and 1 embedded in the fixed body 14.
6 or the spacing between the magnets 16 and 17.

Next, its effect will be explained. Here, the slide member 7 is in the neutral position as the reference position, and the magnet pin 1 is in the neutral position.
2 is assumed to coincide with the magnet 16 of the fixed body 14. In this state, the magnet pin 12 is repelled by the magnet 16 and is fitted into a recess 18 formed in the annular recess 3 of the driven rotating body 2.

When the slide member 7 is moved from this state, for example, in the direction a in FIG. . The rotation of the driven rotating body 2 also rotates the operating rod 4, and this rotation causes the operating piece 5 to move away from the limit switch 6a and toward the limit switch 6b. Here, since the magnet pin 12 is loosely fitted into the elongated hole 11, the magnet pin 12 moves within the elongated hole 11 in a direction approaching the window portion 8 as the driven rotating body 2 rotates. This state is shown in FIG.

Since the magnet pin 12 is set so as to coincide with the magnet 15 when the slide member 7 reaches its travel limit, when the slide member 7 reaches its travel limit, the magnet pin 12 is attracted to the magnet 15. Recess 1
8, and the engagement of the slide member 7 with the driven rotating body 2 is released. When the driving force acting on the slide member 7 is released, the slide member 7 returns to the reference position due to the elastic force of the spring 10. Since the lower end of the magnet pin 12 disengaged from the recess 18 has entered the annular recess 3, it moves along the annular recess 3 as the slide member 7 moves back and returns to the reference position. At this position, it is repulsed again by the magnet pin 16 and fits into the recess 18 .

By repeating this operation, the operating piece 5 separates from the limit switch 6b and moves to the limit switch 6c.
heading to Then, by repeating the operation further, the limit switch 6a is activated again.

In addition, in the above operation explanation, the magnets 15 and 16
Although an example has been shown in which the magnet pin 12 is attracted and repelled between the two, if the slide member 7 is moved in the direction b in FIG.
has the same effect as the magnet 15, and the operating piece 5 separates from the limit switch 6a, and the limit switch 6a
c, and then from limit switch 6c to 6b. Therefore, by arbitrarily combining the moving directions of the slide members 7, it is possible to operate the limit switch 6a, then the limit switch 6b, and then immediately operate the limit switch 6a again.

Further, the mechanism according to the present invention can be applied not only to actuating a predetermined limit switch of an electric device, but also to a variety of other uses, an example of which is shown in FIG. FIG. 6 shows an example in which a shock absorber is applied to damping force adjustment. In this shock absorber, a hollow rod 21 with a piston 20 fixed to the cylinder 19 is fitted in a slidable manner, and the driven rotation is inserted into the hollow rod 21. Insert the rotating shaft 2a extending from the body, and
The damping force is adjusted by aligning the orifice holes 22a of the plate body 22, which has a plurality of orifice holes 22a formed at the lower end thereof, with the oil holes 23. Here, the orifice hole 22a corresponds to the operating piece 5 described in the embodiment.

7 to 9 are diagrams showing other examples of the fixed body, and in the example shown in FIG. 7, two magnets 24 and 25 with different magnetic pole directions are embedded in the fixed body 14. . When using the fixed body 14 having such a structure,
The driven rotating body 2 rotates intermittently only in a fixed direction.

Furthermore, FIG. 8 shows an example in which the fixed body 14 itself is composed of a permanent magnet. With this configuration, the same effect as when three magnets are buried is achieved. However, for positioning during assembly, it is more advantageous to embed the magnet.

Furthermore, in the example shown in FIG. 9, magnets 29, 29, 30, 30,
31 are buried. Here, the magnets 29, 29 have the same magnetic pole direction, and the magnets 30, 30, 31 have magnetic poles in the opposite direction to the magnet 29. For example, if the portion of the magnet pin 12 facing the fixed body 14 is the south pole, the portion of the magnet 29 facing the slide member 7 is the north pole. Further, the spacing between the recesses 18 and 18 and the spacing between the magnets 29 and 31 are made equal, and the magnets 29 and 30 are buried close to each other.

With such a configuration, the attraction effect of the magnet 29 will be exerted only when the magnet 29 and the magnet pin 12 are in the same position. Therefore, when the slide member 7 and the driven rotating body 2 are engaged and rotated together, the magnet pin 12 is attracted by the magnet 29 and does not come off from the recess 18. Therefore, the engagement/disengagement position between the slide member 7 and the driven rotating body 2 can be determined accurately.

In addition, in the present invention, since the frequency of collision between the magnet and the magnet pin is high, in order to extend the life of these components, at least one of the magnet or the magnet pin is coated with aluminum foil or a resin film. Good too. In addition, the shape of the slide member is not limited to the above,
It may be U-shaped in plan. In short, it is sufficient that the movement of the slide member does not interfere with the driven rotating body.

(Effects of the Invention) As explained above, according to the present invention, a fixed body is placed on one side of a slide member that can freely slide with respect to a case, and a driven rotation is overlapped on the other side, and a magnetic pin provided on the slide member is fixed. By attracting or repelling the magnetic part provided on the body, the slide member and the driven rotating body are engaged and disengaged, and the linear motion of the sliding member is intermittently transmitted to the driven rotating body, thereby rotating the driven rotating body by a desired angle. As a result, compared to conventional intermittent rotation mechanisms, it is significantly more compact, the noise associated with operation is reduced, the mechanism itself is easy to assemble, and high-speed operation is possible, among other things. It has the effect of

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the mechanism according to the present invention, Fig. 2 is a plan view of the same mechanism, Fig. 3 is an exploded perspective view of the main components constituting the mechanism according to the present invention, and Fig. 4 is a driven rotating body. FIG. 5 is a plan view similar to FIG. 2 explaining the operation, FIG. 6 is a longitudinal sectional view showing a changed part of the operating section, and FIGS. 7 to 9 show examples of changes to the fixed body. The perspective view shown in FIG. 10 is a diagram showing a conventional intermittent rotation mechanism. In the drawings, 1 is a case, 2 is a driven rotating body, and 3 is a case.
is an annular recess, 7 is a slide member, 8 is a window, 11
is a long hole, 12 is a magnet pin, 14 is a fixed body, 15,
16, 17, 24, 25, 29, 30, and 31 are magnet parts.

Claims (1)

[Scope of Claims] 1. A slide member that makes reciprocating linear motion with respect to the case and is provided with a long hole whose major axis is in a direction different from the direction of the reciprocating linear motion; and a slide member that moves linearly. a biasing member that returns the slide member to the reference position; a magnet pin that is slidably inserted into the elongated hole; and a magnet pin that is fixed within the case so as to overlap one surface of the slide member, and a portion that faces the slide member serves as a north pole. A fixed body in which a magnet portion and a magnet portion serving as an S pole are provided spaced apart or adjacent to each other in the circumferential direction, and a magnet provided in the case so as to overlap the other surface of the slide member and inserted into a long hole in the slide member. An intermittent rotation mechanism comprising: a driven rotating body having a plurality of recesses into which pins are fitted in a circumferential direction at intervals equal to the intervals between the magnet parts.